There is provided a method of sending a sidelink transmission from a wireless transmitter device to a receiver device, connected through a wireless communication network, through one or more time slots, the sidelink transmission comprising performing a Listen-Before-Talk (LBT) procedure during a current time slot, a time slot comprising a PSCCH occasion with a number of PSCCH candidates corresponding to time-frequency resources,wherein the sidelink transmission comprises:- sending (904) a PSSCH transmission to the receiver device at a starting point within said current time slot and before the next time slot is reached, if the LBT procedure is successful after the starting of a PSCCH occasion; and then- sending (906) a PSCCH transmission to the receiver device, after the start of the PSSCH transmission, said PSCCH transmission back indicating the PSSCH, the PSCCH carrying Sidelink Control Information SCI.
